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Related Concept Videos

Applications of Stress01:04

Applications of Stress

550
Consider a structure made of a boom and a rod designed to support a load. These two components are connected by a pin and stabilized by brackets and pins. The boom and the rod are detached from their supports to assess the different stresses imposed on this structure, and a free-body diagram is drawn. Then, all the forces applied, including the load acting on the structure, are identified. The reaction forces exerted on both the boom and the rod are computed using the equilibrium equations.
The...
550
Physiological Foundation of Stress01:24

Physiological Foundation of Stress

439
Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
Role of the Sympathetic Nervous System
Adrenaline triggers the...
439
Introduction to Stress and Lifestyle01:27

Introduction to Stress and Lifestyle

443
Stress is a multifaceted response to events perceived as challenging or threatening, highlighting physical, emotional, cognitive, and behavioral reactions. Physically, stress can lead to fatigue, sleep disruptions, and various health issues such as frequent colds, chest pains, and nausea. Emotionally, it can manifest as anxiety, depression, irritability, and anger triggered by both minor and major life events. Cognitively, it may result in difficulty in concentration, memory, and...
443
Types of Stressors01:23

Types of Stressors

541
A stressor is any event, condition, or stimulus that triggers stress and causes a physical or psychological response in the body. Stressors can be categorized into three main types: catastrophes; significant life changes; and daily hassles, including social stress. Each can be detrimental to physical and mental well-being.
Catastrophes
Catastrophes refer to large-scale, unpredictable events that create overwhelming stress and a sense of threat. Examples include natural disasters like...
541
Psychological Responses to Stress01:20

Psychological Responses to Stress

416
Psychological responses to stress encompass the various cognitive and emotional reactions individuals experience when faced with challenging or threatening situations, such as a job loss. Prolonged exposure to stressors can disturb emotional balance, increasing negative emotions (e.g., anxiety and sadness) and diminishing positive emotions (e.g., joy and satisfaction). These persistent emotional shifts are associated with an increased risk of both physical illness and mental health issues, such...
416
Components of Stress01:23

Components of Stress

438
Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
Interestingly, the hidden cube faces also experience these stresses, equal and...
438

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Updated: Dec 22, 2025

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Reductive Stress: Neglected Science.

Namakkal-Soorappan Rajasekaran1,2,3

  • 1Cardiac Aging and Redox Signaling Laboratory, Center for Free Radical Biology, Division of Molecular and Cellular Pathology, Department of Pathology, University of Alabama at Birmingham, Alabama, USA.

Antioxidants & Redox Signaling
|May 8, 2020
PubMed
Summary
This summary is machine-generated.

Reductive stress (RS) emerges as a critical area beyond oxidative stress, revealing reactive oxygen species (ROS) as vital signaling molecules. Understanding RS is key to various diseases and cellular functions.

Keywords:
Nrf2 signalingcancer and drug resistancemetabolic stressmycobacteriumreductive stress

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Area of Science:

  • Biochemistry
  • Cellular Biology
  • Pathophysiology

Background:

  • The historical focus on oxidative stress in redox biology has overshadowed other crucial aspects of redox balance.
  • Recent research highlights the essential role of reactive oxygen species (ROS) as signaling molecules, not just damaging agents.
  • Over-inhibition of ROS signaling by excessive antioxidants can lead to detrimental cellular effects.

Purpose of the Study:

  • To introduce and explore the emerging concept of reductive stress (RS) as the counterpoint to oxidative stress.
  • To discuss the underlying mechanisms and implications of RS across diverse biological and pathological contexts.
  • To present a comprehensive overview of RS through original research and review articles.

Main Methods:

  • Literature review and synthesis of existing research on redox biology.
  • Analysis of experimental and clinical studies investigating reductive stress.
  • Exploration of theoretical frameworks for understanding the redox spectrum.

Main Results:

  • Reductive stress (RS) represents a significant, yet understudied, aspect of the redox spectrum.
  • Dysregulation of redox balance, including RS, is implicated in various conditions like metabolic disorders, cancer, and cardiac hypertrophy.
  • ROS play dual roles, acting as signaling molecules whose abrogation can be harmful.

Conclusions:

  • A paradigm shift is needed to consider both oxidative and reductive stress in understanding cellular redox homeostasis.
  • Further research into reductive stress mechanisms is crucial for developing novel therapeutic strategies.
  • The concept of reductive stress offers new perspectives on disease pathogenesis and cellular adaptation.